US2025333823A1PendingUtilityA1

Soft magnetic alloy particle, soft magnetic powder, dust core, and electronic component

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Assignee: TDK CORPPriority: Apr 26, 2024Filed: Apr 25, 2025Published: Oct 30, 2025
Est. expiryApr 26, 2044(~17.7 yrs left)· nominal 20-yr term from priority
Inventors:Satoko MoriKazuhiro YoshidomeHiroyuki Matsumoto
H01F 2027/348H01F 27/34H01F 3/08H01F 1/14766B22F 9/082B22F 1/142B22F 1/05C22C 33/0285C22C 38/02C22C 38/10C22C 2202/02B22F 2304/10B22F 2009/0848B22F 2201/10B22F 2301/35B22F 2998/10B22F 2999/00B22F 3/24B22F 3/02B22F 2003/248
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Claims

Abstract

A soft magnetic alloy particle including Fe and Si. One to twenty nitride phases are observed in a cross-section of the soft magnetic alloy particle, an area per each of the nitride phases is within a range of 0.0005 to 10 μm2, and an area ratio of the observed nitride phases occupying the cross-section of the soft magnetic alloy particle is within a range of 0.1 to 2%.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A soft magnetic alloy particle comprising Fe and Si:
 wherein one to twenty nitride phases are observed in a cross-section of the soft magnetic alloy particle,   an area per each of the nitride phases is within a range of 0.0005 to 10 μm 2 , and   an area ratio of the observed nitride phases occupying the cross-section of the soft magnetic alloy particle is within a range of 0.1 to 2%.   
     
     
         2 . The soft magnetic alloy particle according to  claim 1  further comprising Co. 
     
     
         3 . The soft magnetic alloy particle according to  claim 1 , wherein at least one of the nitride phases include silicon. 
     
     
         4 . The soft magnetic alloy particle according to  claim 1 , wherein at least one of the nitride phases include 30 atom % or more of nitrogen. 
     
     
         5 . A soft magnetic powder including the soft magnetic alloy particle according to  claim 1 . 
     
     
         6 . A soft magnetic powder comprising:
 soft magnetic alloy particles comprising Fe and Si,   wherein one to twenty nitride phases per each of the soft magnetic alloy particles in average are observed in cross-sections of the soft magnetic alloy particles,   an area per each of the nitride phases is within a range of 0.0005 to 10 μm 2  in average, and   an area ratio of the observed nitride phases occupying the cross-section of each of the soft magnetic alloy particles is within a range of 0.1 to 2% in average.   
     
     
         7 . A dust core comprising the soft magnetic alloy particle according to  claim 1 . 
     
     
         8 . An electronic component comprising the soft magnetic alloy particle according to  claim 1 .

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